added tests for guid property support
implemented getting simple Guid properties
added tests for parsing empty guid properties (passed)
added test for parsing Guid? values (non passing)
added support for parsing Guid? values
add some additional tests on guid parsing (closes #3)
added test for parsing full time span properties
Implemented basic TimeSpan parsing
added tests for days-hours-minutes-seconds timespans
added support for shorthand timespan "hours only" properties
added support for shorthand timespan "minutes only" properties
added support for shorthand timespan "seconds only" properties
added test checking for supporting big values for shorthanded timespans
added support for shorthand timespan "milliseconds only" properties
added support for shorthand timespan "days only" properties
fix
added support for nullable TimeSpan
Merge branch '1.1.0'